'Moana' TV Spot Introduces Its Fiery Lava Monster

The new preview aired Sunday during NBC's Olympics coverage.

"Ever defeated a lava monster?" asks Dwayne Johnson in a new promo for Moana.

The TV spot, which premiered during the NBC's coverage of the Rio Olympics on Sunday night, introduces a fiery villain of the Walt Disney Animation movie, which follows the titular character, voiced by newcomer Auli'i Cravalho, a young girl from the South Pacific who sets sail for a fabled island with the help of ancient demi-god Maui (voiced by Johnson).

"We've gotta go through a whole ocean of bad," he explains further. Thankfully, Moana knows just how to convince him to join her.

"You'd be a hero — that's what you're all about, right?" she tells him, just before imitating a crowd who was chanting his name.